package com.example.x1c.coolweather;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.x1c.coolweather.db.City;
import com.example.x1c.coolweather.db.County;
import com.example.x1c.coolweather.db.Province;
import com.example.x1c.coolweather.util.HttpUtil;
import com.example.x1c.coolweather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * Created by x1c on 2018/1/15.
 */

public class ChooseAreaFragment extends Fragment {

    private static final String TAG = "ChooseAreaFragment";

    public static final int LEVEL_PROVINCE = 0;

    public static final int LEVEL_CITY = 1;

    public static final int LEVEL_COUNTY = 2;

    private ProgressDialog progressDialog;

    private TextView titleText;

    private Button backButton;

    private ListView listView;

    private ArrayAdapter<String> adapter;

    private List<String> dataList = new ArrayList<>();

    private List<Province> provinceList;

    private List<City> cityList;

    private List<County> countyList;

    private Province selectedProvince;

    private City selectedCity;

    private int currentLevel;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.choose_area, container, false);
        titleText = view.findViewById(R.id.title_text);
        backButton = view.findViewById(R.id.back_button);
        listView = view.findViewById(R.id.list_view);
        adapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, dataList);
        listView.setAdapter(adapter);

        Log.d(TAG, "onCreateView: ");
        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        Log.d(TAG, "onActivityCreated: ");
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if(currentLevel == LEVEL_PROVINCE){
                    selectedProvince = provinceList.get(position);
                    queryCities();
                } else if (currentLevel == LEVEL_CITY){
                    selectedCity = cityList.get(position);
                    queryCounties();
                } else if(currentLevel == LEVEL_COUNTY){
                    String weatherId = countyList.get(position).getWeatherId();

                    if(getActivity() instanceof MainActivity){
                        Intent intent = new Intent(getActivity(), WeatherActivity.class);
                        intent.putExtra("weather_id", weatherId);
                        startActivity(intent);
                        getActivity().finish();
                    }else if(getActivity() instanceof WeatherActivity){
                        WeatherActivity activity = (WeatherActivity) getActivity();
                        activity.drawerLayout.closeDrawers();
                        activity.swipeRefresh.setRefreshing(true);
                        activity.requestWeather(weatherId);
                    }
                }
            }
        });

        backButton.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Log.d(TAG, "onClick: ");
                if(currentLevel == LEVEL_COUNTY){
                    queryCities();
                } else if (currentLevel == LEVEL_CITY){
                    queryProvinces();
                }
            }
        });
        queryProvinces();
    }

    /**
     * 查询中国所有的省，优先从数据库查询，如果没有查询到，再去服务器上查询。
     */
    private void queryProvinces(){
        Log.d(TAG, "queryProvinces: ");
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList = DataSupport.findAll(Province.class);
        if(provinceList.size()>0){
            dataList.clear();
            for(Province province: provinceList){
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        } else {
            String address = "http://guolin.tech/api/china";
            queryFromServer(address, "province");
        }

    }

    /**
     * 查询选中省对应的城市，优先从数据库查询，如果没有查询到，再去服务器上查询。
     */
    private void queryCities(){
        Log.d(TAG, "queryCities: ");
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList = DataSupport.where("provinceid = ?",
                String.valueOf(selectedProvince.getId())).find(City.class);
        if(cityList.size()>0){
            dataList.clear();
            for(City city: cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_CITY;

        } else {
            int provinceCode = selectedProvince.getProvinceCode();
            String address = "http://guolin.tech/api/china/"+provinceCode;
            queryFromServer(address, "city");
        }
    }

    /**
     * 查询选中市内所有的县，优先从数据库查询，如果没有查询到，再去服务器上查询。
     */
    private void queryCounties(){
        Log.d(TAG, "queryCounties: ");
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid = ?",
                String.valueOf(selectedCity.getId())).find(County.class);
        if(countyList.size()>0){
            dataList.clear();
            for (County county : countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        } else {
            int provinceCode =selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
            queryFromServer(address, "county");
        }

    }

    private void queryFromServer(String address, final String type){
        Log.d(TAG, "queryFromServer: ");
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败", Toast.LENGTH_SHORT).show();
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {

                String responseText = response.body().string();
                Log.d(TAG, "onResponse: " + responseText);
                boolean result = false;
                if("province".equals(type)){
                    result = Utility.handleProvinceResponse(responseText);
                } else if ("city".equals(type)){
                    result = Utility.handleCityResponse(responseText,selectedProvince.getId());
                } else if ("county".equals(type)){
                    result = Utility.handleCountyResponse(responseText, selectedCity.getId());
                }
                if(result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if("province".equals(type)){
                                queryProvinces();
                            } else if("city".equals(type)){
                                queryCities();
                            } else if("county".equals(type)){
                                queryCounties();
                            }
                        }
                    });
                }

            }
        });
    }

    /**
     * 显示进度对话框
     */
    private void showProgressDialog(){
        Log.d(TAG, "showProgressDialog: ");
        if(progressDialog == null){
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }

    /**
     * 关闭进度对话框
     */
    private void closeProgressDialog(){
        Log.d(TAG, "closeProgressDialog: ");
        if(progressDialog != null){
            progressDialog.dismiss();
        }
    }
}
